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. 2009 Dec 23;298(3):R729–R739. doi: 10.1152/ajpregu.00713.2009

Table 1.

Subject characteristics and muscle oxidative capacity

Young Older 95% CI P
Height, cm 174 ± 6 177 ± 7 −3, 9 0.319
Body mass, kg 80 ± 9 86 ± 8 −2, 14 0.115
kPCr, s−1 0.026 ± 0.005 0.026 ± 0.005 −0.002, 0.006 0.342
Vmax, M ATP·s−1 0.96 ± 0.14 1.08 ± 0.06 −0.11, 0.34 0.301

Values are mean ± SD. 95% confidence intervals for the difference between groups are presented for each variable. kPCr, rate constant from monoexponential fit of phosphocreatine (PCr) recovery following 16 s maximal voluntary isometric contraction (MVC); Vmax, muscle oxidative capacity.